| Onlinecomponents.com | QW520 | 1 | | 1 | 1 @ $1.27, 2 @ $0.95, 11 @ $0.81 |
| Allied Electronics | 70723574 | 1 | | 1 | |
| Newark | 33C6036 | 1 | | 1 | 1 @ $0.00 |
| ntepartsdirect | QW520 | 1 | -2 | 1 | 1 @ $0.99, 10 @ $0.89, 50 @ $0.84, 100 @ $0.79 |
 Radwell | QW520 | 1 | | 1 | |
| Hawk Electronics | QW520 | 10 | 225 | 10 | 10 @ $1.00, 750 @ $1.00, 1250 @ $0.90, 5000 @ $0.80, 7500 @ $0.80, 15000 @ $0.80 |
 EIO | QW520 | 1 | -2 | 1 | 1 @ $6.20 |
| Digi-Key | 2368-QW520-ND | 5 | 534 | 1 | 5 @ $0.24 |
 AmazonSC | B008UTXDB6 | 1 | -2 | 1 | 1 @ $7.00 |
 Digi-Key | 11652771 | 1 | 409 | 1 | 50 @ $0.24, 100 @ $0.23, 150 @ $0.22, 200 @ $0.20, 250 @ $0.20 |
 jensentools.com | 10128233 | 1 | | 1 | 1 @ $0.95 |
 americanmicrosemi.com | QW520 | 1 | 278 | 1 | 1 @ $0.35, 25 @ $0.35, 100 @ $0.34, 500 @ $0.34, 999 @ $0.34 |
| Galco | QW520-NTE | 1 | | 1 | |
| us.rs-online.com | 70723574 | 1 | | 1 | 1 @ $0.22, 50 @ $0.22, 100 @ $0.21 |
 marvac.com | 80251 | 1 | 5 | 1 | 1 @ $1.95 |
